MESON Chess Problem Database

Problem Display
PID: 225311 (2K5/BR1R4/3p1P2/3kPb2/5P2/6P1/2NPP3/2r5 w - - 0 1)

Lipton, Michael

US Problem Bulletin, 1967

2K5/BR1R4/3p1P2/3kPb2/5P2/6P1/2NPP3/2r5

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Se3#
    • 1...Kc6
      • 2.Sb4#
    • 1...Ke6
      • 2.Rxd6#
  • Keys
    • 1.Rb5+!
      • 1...Kc4
        • 2.Sa3#
      • 1...Ke4
        • 2.d3#
      • 1...Kc6
        • 2.Sd4#
      • 1...Ke6
        • 2.Re7#

This is a version of 9862

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_PINS(A),N_SPINP(d),S_FLIGHT::S(A)
    • K(b);N_PINR(J),N_SPINP(d),S_FLIGHT::R1(J),XP(d)
  • Actual
    • R(I);CHECK
    • Vars
      • K(b);N_PINS(A),N_SPINP(d),S_FLIGHT::S(A)
      • K(b);N_SPINP(d),S_FLIGHT::P(B)
      • K(b);N_PINR(J),N_SPINP(d),S_FLIGHT::R1(J)
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